text: #include <stdio.h>
  #include <stdlib.h>
  
  #include <netdb.h>
  #include <netinet/in.h>
  #include <unistd.h>
  
  #include <string.h>
  
  int main(int argc, char *argv[]) {
      int sockfd, newsockfd;
      uint16_t portno;
      unsigned int clilen;
      char buffer[256];
      struct sockaddr_in serv_addr, cli_addr;
      ssize_t n;
  
      /* First call to socket() function */
      sockfd = socket(AF_INET, SOCK_STREAM, 0);
  
      if (sockfd < 0) {
          perror("ERROR opening socket");
          exit(1);
      }
  
      /* Initialize socket structure */
      bzero((char *) &serv_addr, sizeof(serv_addr));
      portno = 5001;
  
      serv_addr.sin_family = AF_INET;
      serv_addr.sin_addr.s_addr = INADDR_ANY;
      serv_addr.sin_port = htons(portno);
  
      /* Now bind the host address using bind() call.*/
      if (bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
          perror("ERROR on binding");
          exit(1);
      }
  
      /* Now start listening for the clients, here process will
         * go in sleep mode and will wait for the incoming connection
      */
  
      listen(sockfd, 5);
      clilen = sizeof(cli_addr);
  
      /* Accept actual connection from the client */
      newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
  
      if (newsockfd < 0) {
          perror("ERROR on accept");
          exit(1);
      }
  
      /* If connection is established then start communicating */
      bzero(buffer, 256);
      n = read(newsockfd, buffer, 255); // recv on Windows
  
      if (n < 0) {
          perror("ERROR reading from socket");
          exit(1);
      }
      
      if (shutdown(newsockfd, SHUT_RD) < 0) {
      	perror("ERROR shutdown reading socket");
  		exit(1);
      }
  
      printf("Here is the message: %s\n", buffer);
  
      /* Write a response to the client */
      n = write(newsockfd, "I got your message", 18); // send on Windows
  
      if (n < 0) {
          perror("ERROR writing to socket");
          exit(1);
      }
      
      close(newsockfd);
      close(sockfd);
  
      return 0;
  }
  